please help this is very important i will give you brain thing if its correct and no links pwease <3

Sound waves can travel through almost everything so it would be the last one; air(gas), liquid, and solid! Hope this helps!! :)

answer; ///i believe the correct answer is (b) the writing of the ancients who lived in india after the indus valley inhabitants died out;

it would be d). more resources must be obtained to attain that combination of goods and services